other query
modes : |
Identifier query |
Coordinate query |
Criteria query |
Reference query |
Basic query |
Script submission |
TAP |
Output options |
Help |

**
2012A&A...548A..83A -
**
*
Astronomy and Astrophysics, volume 548A, 83-83 (2012/12-1)
*

* *

**
A low-scatter survey-based mass proxy for clusters of galaxies.
**

*
ANDREON S.
*

**
Abstract (from CDS):
**

Estimates of cosmological parameters using galaxy clusters have the scatter in the observable at a given mass as a fundamental parameter. This work computes the amplitude of the scatter for a newly introduced mass proxy, the product of the cluster total luminosity times the mass-to-light ratio, usually referred as stellar mass. The analysis of 12 galaxy clusters with excellent total masses shows a tight correlation between the stellar mass, or stellar fraction, and total mass within r_{500} with negligible intrinsic scatter: the 90% upper limit is 0.06dex, the posterior mean is 0.027dex. This scatter is similar to the one of best-determined mass proxies, such as Y_{X}, i.e. the product of X-ray temperature, and gas mass. The size of the cluster sample used to determine the intrinsic scatter is small, as in previous works proposing low-scatter proxies because very accurate masses are needed to infer very small values of intrinsic scatter. Three-quarters of the studied clusters have lgM≤14M_{☉}, which is advantageous from a cosmological perspective because these clusters are far more abundant than more massive clusters. At the difference of other mass proxies such as Y_{X}, stellar mass can be determined with survey data up to at least z=0.9 using upcoming optical near-infrared surveys, such as DES and Euclid, or even with currently available surveys, covering however smaller solid angles. On the other end, the uncertainty about the predicted mass of a single cluster is large, 0.21 to 0.32dex, depending on cluster richness. This is largely because the proxy itself has ≃0.10 dex errors for clusters of lgM≤14M_{☉} mass.

**
Abstract Copyright:
**
∼

**
Journal keyword(s):
**
*
galaxies: clusters: general - galaxies: stellar content - galaxies: luminosity function, mass function - cosmology: observations - methods: statistical - cosmological parameters
*

**
Status at CDS:
**

**
Simbad objects:
**
15

To bookmark this query, right click on this link: simbad:2012A&A...548A..83A and select 'bookmark this link' or equivalent in the popup menu

2020.03.30-00:59:19

© Université de Strasbourg/CNRS

• Contact